Carpet sweeper brush and pulley



Oct. 6; 1931. J. OWEN CARPET SWEEPER BRUSH AND IULLEY lNlli/VTOR A TTORNE y Filed Sept. 1a, 1926 Ira-J Owe/7 By Patented Oct. 6,1931 I umTEoYsTATEs I OF IC J IRA .1". OWEN, or GRAND RAPIDS, MICHIGAN, Assi roRroBrssnLL onnrng'r swnnrnn I COMPANY, or GRAND nerrns'mronrenu outrun. SWEEPER imusnnitnrurirnv Application filed September 18, 1926. 'seriei'no. 136,309.

1 The main object of the, invention is to provide in such a carpet sweeper brush and pulley, means whereby tained in position and provide an improved bearing for the brush pivot.

Objects relatingto detailsand economies of construction and 'operation of my invention, will definitely appear from the detailed description to follow. i 10. The invention'is defined and pointed out in the claims. a U

A structure which is a preferred embodiment of my invention is illustrated in the accompanying drawings, forming a part of 7 this application, in which 2,

Fig. 1 is a side elevationeview of a carpet sweeper brush, part oif'the bristles being omit- V ted, and some details indicated by dotted I lines.

sectional view of the brush roll and pulley in separatedirelation. V r I Fig. 3 is a similar longitudinal detail sectional view of the roll and pulley in assembled relation. j I e a Fig. 4 is a similar detail side elevation view with the parts in full line, the divided socket in the pulley being indicated by dotted lines. Fig. 5 is an end view of the roll from the right, as seen in Fig. 4. Fig. 6 is an end view of the pulley and roll, the position of the roll being indicated by dotted lines."

Fig. 7 is a sectional view of a desi'gn omitted. t

Fig. 8 is a detail perspective view of the pulley appearing in Fig. 4. t

Fig. 9is an end view of the pulley from the lefthand side ofFig.7. V j

Fig. 10 is a detail view in disassembled relation of a modified form showing a bead engagement on the endof the divided tenon. V The parts will be identified by their numerals of reference which arefthe same in allviews. I i

1 is the brush roll. The

brush roll is pro- Y vided with tenon ll'dividedlongitudinally byaslot 12. The pulley '2 of hard rubber is :30 provided witha 11111121 which contains e the pulley will be re-.

Fig. 2 is an enlarged detail longitudinal slightly modified,t'he hub on the pulley being nally,

which with a pro nally,

divided socket 22, 22 having a wedge-like portion 23 therebetween. The usual brush bearings are provided at the outer side of the pulley. When the tenon 11 is inserted in the hub 21, the wedge-shaped center. portion 23 enters between the. divided parts and spreads them to the position indicated in Fig. 3.

The pulley 2 is made of a hard rubber composition which can be expanded by heat, making it easy to expand the same and drive the brush roll tenon into place. On cooling the rubber shrinks and the joint is very seiurei and requires no glue or adhesive of any It is desirable to have the hub 21 which makes a comparatively deep socket. It has been found, however, that the structure is very good and in the form seen in Figs. 7, 8 and 9 where the hub 21 is omitted. The wedge may be very in Fig. 10. Extra security is small as seen there accomplished by providing an annular bead 13 on the end of the-tenon l1 fitting a corresponding depression 25 in the bottom of the halves of the socket.

The pulley might be made of metal, aluminum being a desirable metal. It would be easy to expand it by heat and make a very efiective structure. The rubber composition is much to be preferred as it answers all purposes and affords a very superior traction on the rubber-tiredfloor wheels of a carpet sweeper.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

l. A carpet sweeper brush having a roll with a projecting tenon divided longitudiand an expansible pulley therefor of rubber composition with a projecting hub in is formed a divided socket with a wedge-shaped partition shrunk on said tenon, the said wedge shaped partition engaging and expanding the said divided tenon, as specified.

I 2. A carpet sweeper brush having a roll 'ecting tenon divided longitudiand an expansible pulley therefor of rubber composition with a divided socket quite economical to produce withie'wedgershaped partitioneshrunk on r said tenon, the said Wedge-shaped partition .engaging and expanding'the said divided tenon,'as specified... Y I -i 5;; 3. A carpet'sweeper brush having a roll with a; projecting tenen divided -longi tudi Q nally, aifnd an expan'sible pulley therefor with" j a divided socket with a Wedge s'haped pg titienahltunkaeep e dtenqn,, he aidwe -1 r.

0 ei p ngleede e pen n .7 thesai'd divided tenon, a s"s"peci-fied."-- l ,ln Witness whereofl haye hepeu ttg set my, 7 .7 

